If they haven't added a tenth member yet I doubt the will...unless you count vivi in which case she's already a member. Well I guess honorary member. As for a crew member that travels with them, I can't really guess till the next few chapters come out. I don't think oda will be adding any more members, especially after the time skip.

If they haven't added a tenth member yet I doubt the will...unless you count vivi in which case she's already a member. Well I guess honorary member. As for a crew member that travels with them, I can't really guess till the next few chapters come out. I don't think oda will be adding any more members, especially after the time skip.

"Nefertari Vivi" has been a member for a long time now but she is not counted cuase she hangs out on a island an not with them, luffy counts her as his "nakama" but doesn't count her as one of the "10" in crew. vivi might be on the end the tenth member but she has to hang out with them more *in which she can't* so she might turn out to be just on of the hundreds of extra crew members

Lol Well, I say they should get a Blacksmith or a Painter XD
Don't hate me cuz I write OC stories but in my story.
There's a girl with Short red hair and one blue eye and one green (My friends Chary) and she has the power of the Mizu Mizu no mi (water water fruit). She an awesome painter and shes very much has a personality like Luffy. (I wish Oda would put another girl on the crew, the need one)

I don't think Boa Hancock will join....
Jinbei probably won't....he is a good candidate but it just seems not right.
Bon Clay??? Um....We'll probably see him again but i dont think he'll be in the crew
Smoker? err...well he is a marine and i know he has a good sense of judgement and goes his own ways, but i think that joining the straw hats is the last thing we do.

But it will be a girl, i believe that'll join the crew. It might be a tomboyish girl that doesn't like the members much because of some rebellion thing and she only listens to Luffy cuz he saved her or something and then she slowly begins to understand that she cant be in the crew if she doesn't get along with other members. (lol Now I want to make a story of that XD But i won't)

Jinbei is really doubtfull. my guess is that he'll stay of fishman island to keep order or something.
and that mermaid girl is a no. the person have some kind of fighting ability and not be a "scardy cat" (Luffy hate people like that)
Boonie is a good candidate, but she's a captain of her own crew, would be fun to see if it turns her way.